With all the ups and downs in the stock market in the last week, it's not surprising that some investors have panicked. But we've also found examples of investors who have kept calm. Here are some of their secrets.

Trefis put a value estimate of $30 a share on LinkedIn as it launched its IPO Thursday. Shares actually opened at $83, raced past $100, and closed at $94.25. Wondering why the Trefis estimate is so much lower? Let's re-examine the fundamentals, and how they arrived at that number.

Asian food is growing in popularity, but casual dining is on a downward slide. Caught in the middle, chain restaurant P.F. Chang's could go either way. Here's a look at a stock that seems promising, but may be a bad bet.

Long disdained as overpriced, TravelZoo might be a promising investment for the brave at heart. Based on most indicators, the stock seems to have a bright future, and its Groupon-style business model suggests considerable growth potential.